Level 1 · Reading series
Lesson 42 · How Does a QR Code Work?
Audio track 42
Listen first
Listen once before opening the English passage.
Open the English passage and hover for word help
A QR Code is a square made of black and white patterns. A phone camera can scan it. Software reads the small blocks and changes them into data, such as a web address.
Large marks near three corners are position markers. They help the reader find the code’s direction. QR Codes also contain extra information. With it, some data can be restored even after minor damage.
Scanning is not the same as trusting. Check the address before opening an unknown page.
Sentence practice
Play any sentence in Dicvo’s Jenny English voice. Before playing all, choose how many times each sentence plays. A practice pause about as long as the sentence follows each play, including before the next sentence. The complete reading remains above.
Choose a sentence to begin.
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A QR Code is a square made of black and white patterns.
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A phone camera can scan it.
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Software reads the small blocks and changes them into data, such as a web address.
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Large marks near three corners are position markers.
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They help the reader find the code’s direction.
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QR Codes also contain extra information.
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With it, some data can be restored even after minor damage.
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Scanning is not the same as trusting.
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Check the address before opening an unknown page.
Check your understanding
After reading, state the main idea in one sentence and find a line that supports it.
Chinese translation
二维码是由黑白图案组成的正方形。手机摄像头可以扫描它。软件读取那些小方块，把它们转换成数据，例如网址。
靠近三个角的大方块是定位标记，帮助设备判断二维码的方向。二维码还含有额外信息，因此在轻微损坏后，有些数据仍能恢复。
扫得出来，不代表链接值得信任。打开陌生网页前，要先检查网址。
Key words and expressions
Key terms have Chinese explanations. Hover over dotted words in the English passage for word help and pronunciation when available.
- QR Code
- 二维码；QR Code 是 DENSO WAVE 的注册商标。
- square
- 正方形；广场。本文是正方形。
- pattern
- 图案；有规律的形状。
- phone camera
- 手机摄像头。
- scan
- 扫描；读取。
- data
- 数据；信息。语法上可作单数或复数。
- web address
- 网址；网络地址。
- position marker
- 用于确定位置的标记。
- restore
- 恢复；复原。
- damage
- 损坏；损伤。
Background notes (Chinese)
二维码最早在日本开发，后来也成为国际标准。定位图案帮助设备识别方向，纠错数据则让部分污损或缺角的二维码仍可能被读取。但扫描成功并不代表它指向的网站安全。
资料来源：DENSO WAVE，QRcode.com 上关于二维码与纠错功能的说明。